Soil nutrient status and fertility evaluation of typical taro producing areas in Shaoguan City

CUI Luoxiao; LIU Ya; ZHAO Lanfeng; ZHANG Xinming; XU Yiwu; XIE Jian; REN Zongling

doi:10.7671/j.issn.1001-411X.202307012

Journal of South China Agricultural University > 2024 > 45(3): 344-353. > DOI: 10.7671/j.issn.1001-411X.202307012

CUI Luoxiao, LIU Ya, ZHAO Lanfeng, et al. Soil nutrient status and fertility evaluation of typical taro producing areas in Shaoguan City[J]. Journal of South China Agricultural University, 2024, 45(3): 344-353. DOI: 10.7671/j.issn.1001-411X.202307012

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Soil nutrient status and fertility evaluation of typical taro producing areas in Shaoguan City

1.
College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
2.
Guangdong Tianhe Agricultural Means of Production Co., Ltd., Guangzhou 510080, China
3.
Agricultural Integrated Service Center, Litang Town, Binyang County, Nanning, Guangxi Zhuang Autonomous Region, Nanning 530409, China

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Received Date: July 19, 2023
Available Online: March 12, 2024
Published Date: March 10, 2024

Graphical Abstract

Abstract

Abstract

Objective
To better understand the soil fertility status in typical taro producing areas in Shaoguan City, Guangdong Province, and provide suggestions for soil nutrient management in taro producing areas.
Method
The 0−30 cm soil samples were collected from taro rhizosphere in Laojun Village of Guitou Town, Guanpotan Village and Nongzhuang Village of Langtian Town from Shaoguan City, to determine the physical and chemical properties. Principal component analysis and correlation analysis were conducted to select the key indicators that best represent local soil fertility entering into minimum data set. All indicators were normalized using membership functions, and soil quality indices were calculated for soil fertility evaluation.
Result
The soils in three taro producing areas were all acidic with suitable bulk density (1.17 g·cm⁻³) and texture, but with low cation exchange capacity (CEC, 9.17 cmol·kg⁻¹). The contents of available P (54.20 mg·kg⁻¹), Cu (2.07 mg·kg⁻¹), Fe (186.33 mg·kg⁻¹), Zn (1.87 mg·kg⁻¹) were rich, while the contents of available Mn (4.21 mg·kg⁻¹), B (0.12 mg·kg⁻¹), Mo (0.10 mg·kg⁻¹) were deficient or extremely deficient. The contents of other nutrients were at moderate to above-average levels. Among the three taro producing areas, there were significant differences in the percentage of soil grain size, contents of alkali-hydrolyzed N, exchangeable Ca, and exchangeable Mg, whereas the differences in other indicators were not significant. Seven indicators were selected to build the minimum data set for soil fertility evaluation, including alkali-hydrolyzed N, sand, clay, exchangeable Ca, available B, and available Fe contents as well as CEC. The evaluation results indicated that the soil fertilities of the three taro producing areas were at moderate levels, and the contents of alkali-hydrolyzed N and exchangeable Ca were the main limiting factors.
Conclusion
The overall soil fertility level of typical taro producing area in Shaoguan City is moderate, with poor soil nutrient retention capacity and deficiencies in trace elements, such as available Mn, B and Mo. Therefore, it is important to use organic fertilizers and micronutrient fertilizers during taro cultivation. Balanced fertilization shall be practiced to improve soil properties and enhance its nutrient retention capacity.
- Taro producing area,
- Nutrient level,
- Minimum data set,
- Soil fertility evaluation

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References (49)

References

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